Hello, id like to connect to the Community but I get this error:

Mixed Content: The page at 'https://ernstco.ch/index.php/dashboard/extend/connect/register_step1/' was loaded over HTTPS, but requested an insecure frame 'http://www.concrete5.org/marketplace/connect/-/register_step1?ts=1611313833&csiBaseURL=https%3A%2F%2Fernstco.ch&csiURL=https%3A%2F%2Fernstco.ch&csToken=D3riqBKIU9vlbwJPC09xVGIsj4T04hcB9MSOpc2FbQ7ma7CTkbsWoVgrYbIS9jZK&csReferrer=https%3A%2F%2Fernstco.ch%2Findex.php%2Fdashboard%2Fextend%2Fconnect%2Fconnect_complete%2F&csName=Ernst%20+%20Co,%20Immobilien,%20K%C3%BCsnacht'. This request has been blocked; the content must be served over HTTPS.

How/where can I do this?